Mold.



W. D. HARRELL.

MOLD.

APPLIGATION FILED mn.11,1eoe.

981,557. y Patented Jan.1o, 1911..

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WILLIAIVI :BRAKE HABRELL, OF LAGRO, INDIANA, ASSIGNO FRANKLIN RAMSEY ANDONE-THIRD TO CHARLES BREUNINGER, BOTH OF LAGRO,

INDIANA.

Application filed March 17, 1909.

MOLD.

Specification of Letters Patent.

.To all whom t may concern:

Be 1t known that I, VILLIAM Duane HannnLL, a citizen ot the UnitedStates, resid- 'ing at lrwro, in the county of lNabash and re State otIndiana, have invented certain new1 and useful Improvements in Molds;and I' e and my invention has for its object to provide an expanding andcontracting metal drum so constructed and arranged that a culif'ert orthe like can be quickly and accurately molded.

lVith this object in view my invention consists in the novel means torexpanding and contracting the drum.

leterring to the accompanying drawings: Figure 1 is a plan view of theouter drum in an expanded position. Fig. 2 a similar view showing thedrum in a contracted position. Fig. 3 is an end view of the outercontracting drum. Fig. 4 is an end view of the drum in its contractedposition. Fig. 5 is an end view ot the inner drum in its contractedposition, and Fig. 6 is an end view of the cistern or man-hole showingthe drums in operative position.

Like numerals of reference indicate the saine parts throughout theseveral igures in which:

1 indicates the outer contracting drum and 2 the inner expanding drum.As will appear from Figs. 1 and 2 two straps 3 are suitably securedlongitudinally of the outer drum 1 to which straps 3 suitable links 4are pivoted at 5.

The links 4 are arranged in two series A and B, the series ot links Abeing pivoted at their inner ends to a traveling bed 6; while the seriesot links B are pivoted at their inner ends to a similar traveling bed'7. Fach of the beds 6 and 7 are provided at their outer ends with awall 8 and at their lower ends with a wall 9, the walls 9 or' each oitthe traveling beds 6 and 7 being threaded to receive the operating rod10.

rFhe threads in the wall 9 ot the traveling bed 7 are lett hand, whilethe threads in the wall 9 of the traveling bed 6 are right hand, anoperating rod 10 being provided with a lett hand threaded portion 11 anda right hand threaded portion 12 as clearly shown in Figs. 1 and 2,suitable cranks 13 being secured on each end of the operating rod 10 asclearly shown in the drawing.

Referring now to the inner expanding drum 2 it will be seen that twolongitudinal straps 14 are arranged on the inside of the drum 2, saidlongitudinal straps 14 carrying links 15 which are pivoted to the straps14, the links 15 operating rod 16 and travel ing beds 17 being preciselythe same as those applied to the outer drum and as is shown in Figs. 1and 2.

Having thus described the several parts of my invention its operation isas follows: When it is desired to mold a culvert, basin, manhole,cistern or the like wherein it is required to use both drums the insidedrums are placed in position shown in Fig. 6 and the cement, concrete orthe like of which the article is to be molded is arranged between thedrums as shown in Fig. 6. In order to contract the outer drum 1 theoperating rod 10 is rotated which draws the two traveling beds 6 and 'l'toward each other thus carrying the links 4 into position shown in Fig.2, thereby contracting the outer drum 1, the amount of contractiondepending ot' course upon the amount of rotation of the operating rod10. In order to expand the inner drum 2 the operating rod 16 is rotatedin order to force the traveling beds 17 away from each other in suchmanner as to carry the links 15 into position shown in Fig. 1, therebyexpanding the drum 2, the amount of expansion depend ing of course uponthe extent of rotation oi' the operating rod 16.

lt is of course obvious that in certain classes of work only the innerdrum 2 is required, while in other classes only the outer drum 1 may beused. In this instance the outer drum 1 is contracted as just described,while the inner drum 2 for use alone is expanded in the manner as justset forth.

`With the construction of the drums shown and described it is notabsolutely necessary that the plastic material be allowed to set veryhard, for the reason that in expanding the outer drum 1 away from thematerial or R 0F ONE-THIRD TO JAMES kthe material the surface of thedrums draw away from the material in a shearing inanner in such a waythat the tendency to pull loose the concrete, cement or the like isentirely obviated. By my construction of drums therefor il am enabled tocomplete a piece of work in a minimum amount of time; while owing to theextreme simplicity of `construction the drums are extremely light. andcan lbe readily Atransported Afrom place to place. It will also be seenAby referring `to Figs. 5 and yG that when utilizing the inner drum 2 in'a horizontal position the entire lower lportion of the ldrum 2 isunobstructed, thereby allowing` a free passage of water and trashthrough the drum while vthe same is `yet in position.

Having thus fully described my invention what claim as new and desire tosecure by Letters Patent of the United States is l. A. device o'f thecharacter described, comprising a Alongitudinally split drum, a handledshaft extending` longitudinally of saididrum and having right and lefthanded screwthreads extending` from the center of said 'shaft toward itsends, carrying plates having upstanding end lugs, the inner end lugshaving engagement with the right and left screw-'threads of said shaft,the outer end lugs having unthreaded connection with said shaft andseries of links, each carrying plate having a series of links connectedtandem-fashion thereto at their inner ends at opposite sides of theshaft, the outer ends of the series of links being connected to saiddrum at opposite sides of its slit, respectively.

2. A device of the character described, comprising inner and outerlongitudinally split drums, a handled shaft for each drum having rightand left screw-threads extending from its center toward its ends,carrying plates having upstanding end-lugs, the inner end lugs havingengagement with the screw-threads of a shaft, the opposite end lugshaving Unthreaded connection with a shaft and series of links connectedtandem fashion thereto, a series being connected at their inner ends toeach plate upon each side of a shaft, the opposite ends of said linksbeing connected to a drum upon opposite sides of its split,respectively.

In testimony whereof, aiiix my signature, in presence of two witnesses.

VVI-LLIAM BRAKE HARRELL.

'Vitnesses JOHN REYNOLDS, L. S. MCCLANAHAN.

